Only thing you can do is try to recover data from the hard drive in some way. If it is a NTFS system you are going to need to slave it to another system or use a second hard drive with W2k or XP on it to read the bad drive.

Or you could make a Bart PE CDR boot disk with XP SP1 or Win 2003:
[link|http://www.nu2.nu/pebuilder/|http://www.nu2.nu/pebuilder/]

Then boot off of it and see if you can access the hard drive and pull off the data files. It can take Nero 5.X to burn to a CDR if you have a registered copy of Nero and a CDR drive.

IDE errors are never good, signs of a failing hard drive. Get whatever you can off of the drive and then replace it. With errors it may never run Windows again or any other OS for that matter. If the hard drive rattles, it is even worse.